+++ /dev/null
-/*
- * compose persistent device path
- *
- * Copyright (C) 2009 Martin Pitt <martin.pitt@ubuntu.com>
- * Portions Copyright (C) 2004 David Zeuthen, <david@fubar.dk>
- * Copyright (C) 2011 Kay Sievers <kay.sievers@vrfy.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <linux/limits.h>
-#include <linux/input.h>
-
-#include "udev.h"
-
-/* we must use this kernel-compatible implementation */
-#define BITS_PER_LONG (sizeof(unsigned long) * 8)
-#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
-#define OFF(x) ((x)%BITS_PER_LONG)
-#define BIT(x) (1UL<<OFF(x))
-#define LONG(x) ((x)/BITS_PER_LONG)
-#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
-
-/*
- * Read a capability attribute and return bitmask.
- * @param dev udev_device
- * @param attr sysfs attribute name (e. g. "capabilities/key")
- * @param bitmask: Output array which has a sizeof of bitmask_size
- */
-static void get_cap_mask(struct udev_device *dev,
- struct udev_device *pdev, const char* attr,
- unsigned long *bitmask, size_t bitmask_size,
- bool test)
-{
- struct udev *udev = udev_device_get_udev(dev);
- char text[4096];
- unsigned i;
- char* word;
- unsigned long val;
-
- snprintf(text, sizeof(text), "%s", udev_device_get_sysattr_value(pdev, attr));
- info(udev, "%s raw kernel attribute: %s\n", attr, text);
-
- memset (bitmask, 0, bitmask_size);
- i = 0;
- while ((word = strrchr(text, ' ')) != NULL) {
- val = strtoul (word+1, NULL, 16);
- if (i < bitmask_size/sizeof(unsigned long))
- bitmask[i] = val;
- else
- info(udev, "ignoring %s block %lX which is larger than maximum size\n", attr, val);
- *word = '\0';
- ++i;
- }
- val = strtoul (text, NULL, 16);
- if (i < bitmask_size / sizeof(unsigned long))
- bitmask[i] = val;
- else
- info(udev, "ignoring %s block %lX which is larger than maximum size\n", attr, val);
-
- if (test) {
- /* printf pattern with the right unsigned long number of hex chars */
- snprintf(text, sizeof(text), " bit %%4u: %%0%zilX\n", 2 * sizeof(unsigned long));
- info(udev, "%s decoded bit map:\n", attr);
- val = bitmask_size / sizeof (unsigned long);
- /* skip over leading zeros */
- while (bitmask[val-1] == 0 && val > 0)
- --val;
- for (i = 0; i < val; ++i)
- info(udev, text, i * BITS_PER_LONG, bitmask[i]);
- }
-}
-
-/* pointer devices */
-static void test_pointers (struct udev_device *dev,
- const unsigned long* bitmask_ev,
- const unsigned long* bitmask_abs,
- const unsigned long* bitmask_key,
- const unsigned long* bitmask_rel,
- bool test)
-{
- int is_mouse = 0;
- int is_touchpad = 0;
-
- if (!test_bit (EV_KEY, bitmask_ev)) {
- if (test_bit (EV_ABS, bitmask_ev) &&
- test_bit (ABS_X, bitmask_abs) &&
- test_bit (ABS_Y, bitmask_abs) &&
- test_bit (ABS_Z, bitmask_abs))
- udev_builtin_add_property(dev, test, "ID_INPUT_ACCELEROMETER", "1");
- return;
- }
-
- if (test_bit (EV_ABS, bitmask_ev) &&
- test_bit (ABS_X, bitmask_abs) && test_bit (ABS_Y, bitmask_abs)) {
- if (test_bit (BTN_STYLUS, bitmask_key) || test_bit (BTN_TOOL_PEN, bitmask_key))
- udev_builtin_add_property(dev, test, "ID_INPUT_TABLET", "1");
- else if (test_bit (BTN_TOOL_FINGER, bitmask_key) && !test_bit (BTN_TOOL_PEN, bitmask_key))
- is_touchpad = 1;
- else if (test_bit (BTN_TRIGGER, bitmask_key) ||
- test_bit (BTN_A, bitmask_key) ||
- test_bit (BTN_1, bitmask_key))
- udev_builtin_add_property(dev, test, "ID_INPUT_JOYSTICK", "1");
- else if (test_bit (BTN_MOUSE, bitmask_key))
- /* This path is taken by VMware's USB mouse, which has
- * absolute axes, but no touch/pressure button. */
- is_mouse = 1;
- else if (test_bit (BTN_TOUCH, bitmask_key))
- udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHSCREEN", "1");
- }
-
- if (test_bit (EV_REL, bitmask_ev) &&
- test_bit (REL_X, bitmask_rel) && test_bit (REL_Y, bitmask_rel) &&
- test_bit (BTN_MOUSE, bitmask_key))
- is_mouse = 1;
-
- if (is_mouse)
- udev_builtin_add_property(dev, test, "ID_INPUT_MOUSE", "1");
- if (is_touchpad)
- udev_builtin_add_property(dev, test, "ID_INPUT_TOUCHPAD", "1");
-}
-
-/* key like devices */
-static void test_key (struct udev_device *dev,
- const unsigned long* bitmask_ev,
- const unsigned long* bitmask_key,
- bool test)
-{
- struct udev *udev = udev_device_get_udev(dev);
- unsigned i;
- unsigned long found;
- unsigned long mask;
-
- /* do we have any KEY_* capability? */
- if (!test_bit (EV_KEY, bitmask_ev)) {
- info(udev, "test_key: no EV_KEY capability\n");
- return;
- }
-
- /* only consider KEY_* here, not BTN_* */
- found = 0;
- for (i = 0; i < BTN_MISC/BITS_PER_LONG; ++i) {
- found |= bitmask_key[i];
- info(udev, "test_key: checking bit block %lu for any keys; found=%i\n", i*BITS_PER_LONG, found > 0);
- }
- /* If there are no keys in the lower block, check the higher block */
- if (!found) {
- for (i = KEY_OK; i < BTN_TRIGGER_HAPPY; ++i) {
- if (test_bit (i, bitmask_key)) {
- info(udev, "test_key: Found key %x in high block\n", i);
- found = 1;
- break;
- }
- }
- }
-
- if (found > 0)
- udev_builtin_add_property(dev, test, "ID_INPUT_KEY", "1");
-
- /* the first 32 bits are ESC, numbers, and Q to D; if we have all of
- * those, consider it a full keyboard; do not test KEY_RESERVED, though */
- mask = 0xFFFFFFFE;
- if ((bitmask_key[0] & mask) == mask)
- udev_builtin_add_property(dev, test, "ID_INPUT_KEYBOARD", "1");
-}
-
-static int builtin_input_id(struct udev_device *dev, const char *command, bool test)
-{
- struct udev_device *pdev;
- unsigned long bitmask_ev[NBITS(EV_MAX)];
- unsigned long bitmask_abs[NBITS(ABS_MAX)];
- unsigned long bitmask_key[NBITS(KEY_MAX)];
- unsigned long bitmask_rel[NBITS(REL_MAX)];
-
- /* walk up the parental chain until we find the real input device; the
- * argument is very likely a subdevice of this, like eventN */
- pdev = dev;
- while (pdev != NULL && udev_device_get_sysattr_value(pdev, "capabilities/ev") == NULL)
- pdev = udev_device_get_parent_with_subsystem_devtype(pdev, "input", NULL);
-
- /* not an "input" class device */
- if (pdev == NULL)
- return EXIT_SUCCESS;
-
- /* Use this as a flag that input devices were detected, so that this
- * program doesn't need to be called more than once per device */
- udev_builtin_add_property(dev, test, "ID_INPUT", "1");
- get_cap_mask(dev, pdev, "capabilities/ev", bitmask_ev, sizeof(bitmask_ev), test);
- get_cap_mask(dev, pdev, "capabilities/abs", bitmask_abs, sizeof(bitmask_abs), test);
- get_cap_mask(dev, pdev, "capabilities/rel", bitmask_rel, sizeof(bitmask_rel), test);
- get_cap_mask(dev, pdev, "capabilities/key", bitmask_key, sizeof(bitmask_key), test);
- test_pointers(dev, bitmask_ev, bitmask_abs, bitmask_key, bitmask_rel, test);
- test_key(dev, bitmask_ev, bitmask_key, test);
- return EXIT_SUCCESS;
-}
-
-const struct udev_builtin udev_builtin_input_id = {
- .name = "input_id",
- .cmd = builtin_input_id,
- .help = "input device properties",
-};
~ianmdlvl / elogind.git / blobdiff